CEOs at the largest U.S. companies received about a 3 percent increase in total compensation in 2015, with the median package valued at $14.5 million, according to a report from Equilar, a provider of executive compensation data based in Redwood City, Calif.

Only companies that filed their proxies before April 1 were examined for Equilar's midseason report. It's a preview of sorts for a larger list the data firm does each year with the New York Times at the end of the proxy season.

Equilar counts salary, bonus, other compensation (which includes perks and benefits) and the grant-date value of stock and option awards.

Three Minnesota CEOs are in Equilar's midseason list of the 100 highest-paid CEOs. Inge Thulin, chairman and CEO of Maplewood-based 3M Co., was the highest-ranked Minnesota CEO at No. 46, with total compensation of $15.5 million. US Bancorp's chairman and CEO, Richard Davis, was No. 70, with total compensation of $11.4 million. Ken Powell, chairman and CEO of General Mills, ranked No. 90 with $8.3 million.

Proxies of Minnesota's two largest public companies, UnitedHealth Group and Target Corp., were filed after April 1. Best Buy, the state's third-largest public company by revenue, has yet to file its proxy.

The highest-paid CEOs from the first half of the proxy season were Oracle Corp.'s co-CEOs Mark Hurd and Safra Catz. They each had $53.2 million pay packages. Robert Iger, CEO of Walt Disney Co., was third with total compensation of $43.5 million.

Equilar's 100-largest companies based on revenue ranged from NextEra Energy, with $17.5 billion in revenue, to Apple, the largest with $233.7 billion. Apple was followed by Berkshire Hathaway, at $210.8 billion.

The CEOs of the two largest companies are not the highest-paid. Compensation for Apple's Tim Cook was below the median at $10.3 million. Berkshire CEO Warren Buffett, whose wealth comes largely from long-term stock appreciation, was paid $470,244.